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Which of the following is a carboxylic acid?

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Question: Which of the following is a carboxylic acid?

Options:

  1. C2H5OH
  2. C3H6O
  3. C2H4O2
  4. C3H8

Correct Answer: C2H4O2

Solution: 

C2H4O2 (Acetic acid) is a carboxylic acid.

Which of the following is a carboxylic acid?

Practice Questions

Q1
Which of the following is a carboxylic acid?
  1. C2H5OH
  2. C3H6O
  3. C2H4O2
  4. C3H8

Questions & Step-by-Step Solutions

Which of the following is a carboxylic acid?
  • Step 1: Understand what a carboxylic acid is. It is an organic compound that contains a carboxyl group (-COOH).
  • Step 2: Look at the chemical formula given, which is C2H4O2.
  • Step 3: Break down the formula C2H4O2. It has 2 carbon (C) atoms, 4 hydrogen (H) atoms, and 2 oxygen (O) atoms.
  • Step 4: Check if the formula can be arranged to show a carboxyl group. C2H4O2 can be written as CH3COOH, which shows the -COOH group.
  • Step 5: Since C2H4O2 contains the -COOH group, it is classified as a carboxylic acid.
  • Step 6: Conclude that C2H4O2 is acetic acid, which is indeed a carboxylic acid.
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